What is total internal reflection?
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23rd Nov, 2021
Total internal reflection definition: TIR (total internal reflection) is an optical phenomenon in which waves, such as light, are entirely reflected when they reach the boundary between two mediums, such as air and water, under particular conditions. When waves travelling in one medium collide with another medium with a higher wave speed (lower refractive index), they are not refracted into the second ("external") medium but are entirely reflected back into the first ("internal") medium.
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